Android 8.1 screen orientation issue: flipping to landscape a portrait screen

Question

I have all activities in portrait mode except the one that I use to play a video that is always landscape. I found that on Android 8.1 every time I open the video activity a

Answer 1

from Narmi's answer:

When you will back to Activity A from Activity B and if you know the screen's orientation of the Activity A, so set the screen orientation into the ondestroy of Activity B.

you have to detect if activity is destroying from configuration change, so add field isConfigurationChanged = false, then on onSaveInstanceState method turn it to true and on onDestroy method add this:

@Override
protected void onDestroy() {
    if(!isConfigurationChanged)
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    super.onDestroy();
}